Jusr noticed the advert. for the exposition is itself a work in progress. Originally it promised books by Tolkien and original art and memorabilia. Implying original art by Tolkien, which we know ain't gonna happen - we know it meant 'original art from the books, by other artists. Now, in an attempt to clarify, we get this:

"Exposition attendees will also have an exciting opportunity to meet the artists themselves and learn more about their work. Exposition attendees will also have an exciting opportunity to meet some of the artists themselves and learn more about their work."